Means for cooling printing-rollers.



D. E. LYNCH.

MEANS FOR cooums PRINTING ROLLERS.

APPLICATION FILED JULY 20. I914- Pmtented Sept. 14, 1915.

' means whereby Warren Parana orieicn.

DANIEL E. LYNCH, OF CHICAGO, ILLINOIS, ASSIG'NOR OF ONE-FOURTH TOCORNELIUS D.

ROBBINS, ONE-FOURTH TO PATRICK J. CRONIN' AND ONE-FOURTH TO JAMES J.

LYNCH, ALL OF CHICAGO, ILLINOIS.

MEANS FOR COOLING PRINTING-ROLLERS.

To all Iv/mm. it may concern Be it known that I, DANIEL E. LYNCH, a citizen oifilre' United States, residing at Chicago, in the county of ook and State of Illinois, have invented certain new and useful Improveinents in Means for Cooling Printing-Rollers, of whichthe t'ollo wing is a specification. v i

In the operation of highspeed printing;

presses it becomes necessary, especially'dur of fans or by anair blastt'rom other sources.

It 15 also necessary to provide cushioning to absorb the momentum of the reciprocatory bed of the press at each extreme of its stroke,'and for this purpose dash pot mechanism hasbeen employed.

Where an air blast has been utilized to cool the inking rollers an expenditure of power and pneumatic installation has been involved and where dash pot mechanism has been availed of to cushion the press at its change in direction of increment the energy thus generated has been wasted.

The object of this invention is to utilize the air compressed in the one case to perform the useful function of the cooling fans in the other and thus etl'ect a material saving in cost of installation and operation and of the space which would otherwise be required for the operation of the cooling devices. I accomplish this object-bv leading the compressed air from the dash pot devices to a. suitable expansion chamber where it is permitted to expand, thus lowering the temperature, and then conduct the cool air to a suitable point of discharge upon and over the inking rollers. Thus the air compressed in the dash pot mechanism, instead of being wasted as heretofore, is utilized to efl ct the cooling of the inking rollers without the necessity of installing a special blowing" system and furnishing power to drive the same.

Specification of Letters Patent.

,of printing, press.

ther detailed description is Patented. Sept. 14,1915; Application filed July 20, 191 Serial No. 851.909. I

In order that the invention may be readily understood a preferred embodiment of'the same is set forth in the accompanying drawing and in the descriptn'm based thereon, wherein the san' e is shown and described as installed in connection with a typical form As, however, the constructional features of the invention would 1 be modified within a wide range to conform As illustrated the press is indicated genwith the requirements of the particular in I and description are.

erally at 11 and includes a reciprocatory bed i 12, and the ink feeding and distributingrolls l3 and 14. The press is shown as.- equipped with a dash pot mechanism including the-cylinders 15 and 16 fixed to the frame and adapted to receive at each stroke of the bed the piston members 17 and 18 warried by the latter whereby the bed is cushioned at each extreme of its stroke.

This construction is well known and furconsidered to be unnecessary. p

From the closed end of the cylinder'or dash pot 15 leads an air conducting pipe '19 and from theclosed end of the dash pot 16 leads a similar pipe 20. The pipes 19 and 20 are provided with non-return check valves 21 and 22 respectively and beyond these check valves a pipe 23 leads to an eX pansion tank 24-. From the expansion tank a valved pipe 25 conducts the expanded air to the branches 26 and 27 the former of which terminates in a header 28 and nozzles 2!) and 30 which discharge the air over and upon. the inking rollers 13, while the pipe 27 leads to the header Ell and the nozzles 32 and whence the air is discharged over and upon the inking rollers 14.

It is believed tlltlt tll operation of the device will be obvious from the above description. Assuming), the bed 12 of the press to have completed its movement to the left, as illustrated, the air within the dash pot 15 is compressed and forced past the check valve 21 into the expansion chamber 2% where it expands and is thereby cooled. Upon the reverse movement of the press the piston 18 compresses the air within the cylinder 16 and the compressed air is forced through the pipe 20 past the check valve 22 to the expansion chamber 24 where it is permitted to expand and cool. The ex-' panded cooled air is then blown through the pipes 26 and 27 to the headers 28 and 31 and discharged upon the inking rollers by virtue of the pressure of the air constantly supplied to the expansion tank by the, successive reciprocatory movements of the press so that a substantially constant supply of air flows from the discharge nozzles upon the inking rollers and maintains the same at an appropriate temperature.

By my invention, not only is the air compressed in the cushioning of the bed utilized in the cooling of the rollers and an economy thus effected, but it has been demonstrated in practice that .the cushioning eliiciency of the dash' pot mechanism'is itself greatly enhanced and the shock attendant upon reversal of the bed movement minimized, the nesiliency of the air cushion being increased its extended distribution through the pipes and the compression tank, and the wear on the pistons and the gearing and other working parts appurtenant to the bed is thereby reduced. In addition to preventing the rollers from melting, the continuous 'fiow'of air keeps the form rollers, distributing rollers and ink plate free from dirt, lint and'nap that paper always gives off and Which settles around the bands of the press \as Well as on the inking rollers, and as a result the forms do not have to be scrubbed. It also keeps the rollers free fronrall particles 'of dirt, dust and bronze powder. Moreover, the flow of air from the dash pots may be utilized to supply the air jets now used in connection with feeding and delivery mechanism for the automatic registering of sheets and the like.

I claim:

1. The combination with a moving body associated with elements subject to heating, of a nozzle arranged to discharge an air current on the heated elements, means operated by the moving body to cause a flow of air through the nozzle, and means to modify the temperature of the air in its passage to the nozzle.

2; The combination with a reciprocatory bed of a printing press, and the inking rollers cooperating therewith, of pneumatic means arranged to cushion the reciprocatory bed, a system of air pipes leading from the pneumatic means and discharging onto the inking rollers} and means interposed in said system to lower the temperature of the air.

The combination with a rcciprocatory bed of a printing press, and the inking rollers cooperating therewith, of dash pot mechanism arranged to cushion the reciprocatory bed, a system of air pipes leading from the dash pots and discharging on to the inking rollers, and means to lower the temperature of the air after leaving the dash pots.

4. The combination with a reciprocatory bed of a printing press, and the inking rollers cooperating therewith, of dash pot mechanism arranged to cushion the reciprocat-ory bed, a system of air pipes leading from the dash pots and discharging on to the inking rollers, and an expansion tank interposed in the air conducting system.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

DANIEL E. LYNCH.

Witnesses Pivrmcit J. Cnomx, Arman B. STRATTON. 

